The data that the MDEX Engine returns in response to a query includes all of the information that the application modules need to build an entire page for a typical application.

The MDEX Engine returns the following objects in response to a query request:

This enables the MDEX Engine to reduce the number of queries required to build an entire page, and thus to improve performance. The performance improvement is gained by using the processing for one section of a page to build the rest of the page.

For example, separate requests for record search information and navigation control information can be redundant. (Of course, you can make as many queries to the MDEX Engine as you want to build your pages, if the application design warrants it.)